The 4-72-3.6A-4.0 kW fan is a common centrifugal ventilator widely used in industrial and civil applications.

Below is a detailed introduction:

- Meaning: "4-72" is the fan series model; "3.6" indicates that the fan impeller diameter is 360 mm; "A" denotes the drive method as direct motor drive; "4.0 kW" indicates that the motor power equipped with the fan is 4.0 kilowatts.

- Performance Parameters: The fan's air volume range is generally 2964-5968 m3/h, and the total pressure range is 1788-1089 Pa.

- Structural Composition: Mainly consists of an impeller, casing, air inlet, motor, and other components. The impeller is composed of 10 backward-inclined airfoil blades, a curved front disc, and a flat rear disc, made of steel plate and dynamically and statically balanced. The casing for models 2.8-12 is made as a single unit and cannot be disassembled, while the casing for models 16-20 is made in three sections. The air inlet is manufactured as a single unit, mounted on one side of the fan, with a curved cross-section parallel to the axial direction, allowing smooth airflow into the impeller with minimal loss.

- Features and Applications: It boasts excellent aerodynamic performance, stable operation, low vibration, and long service life. It can transport air and gases harmless to humans and non-corrosive to titanium steel materials. The gas must not contain viscous substances, and the dust and particle content should not exceed 150 mg/m3. The gas temperature must not exceed 80°C. It is widely used for indoor ventilation in industrial and mining enterprises, large buildings, hotels, restaurants, etc., and can also be used for ventilation in general factory buildings.